Double-faced clock.



G. 0. DE CLARK. DOUBLE FAGED CLOCK.

APPLICATION FILED JULY 23, 1912.

" 1,068,417. Patented July 29, 1913.

EI L

I 4/ 3 49 j 7 W/l/l/l/V/ GEORGE 10. .DE OF'B'RQQKWNJNEW rm DEUBLE-NAOED "GLQGK.

Zpeclficatiew 01 Letters. Patent, 1 Applicetionfiledlnly23, r912. .Seflalli'o. 713m Batented July 29,1913n .To all whom itrmqzg concern:

Be it :known that .1, GEOBGEO. DE CLARK,

-.a citizen of the United States residing at Brooklyn, in .the county of Kings and State -of New York; have invented new :and useed or otherwise upheld loya suitable sup-- port, .and to contain within itself the entire mechanism for giving motion to the hands; Themechanismmay be conveniently divided intotwoparts, 0ne;part comprising the usual train of wheelsvmeans for imparting -.m0tion thereto: and .a. regulating device for dimitin the speed of rotation of said train of w eels. This part of .themecha- .nism is preferably small .and of compact form and is int-fact a. small. clock movement, removably mounted in the clock frame vin such manner as ,to permit .its easy with--- drawal :when necessary .to: clean," oil, regulate and repair. .Theotherparto'f the mechanism includesla set of .gearwheels forlrotating the hands ofteach dial mounted .in a frame rigidly secured to the clock casing a vertical shaft ljournaled on anti-friction hearings in said casing driven .by the first part of the mechanism to which it isconnected by a separable coupling, and bevel gear wheels between said shaft .and theaforesaid set of gearwheelsfor. drivingthem andthe hands The vertical s'haftis made flexible by some suitable means,.such .as a universal joint, whereby any .lack ofaline inentbetween saidsha'ftandtthe. shaft of the small clock movement .to which it is connected will 'be compensated for, and any interference or interruption .in the operation of themechanism due toincorrect set ting or placing of the pertsprevented,

clock constructed in this manner is simple. easily cared (for and regulated, and not w affected by the shocks, vibrations and move ments of the caseztmwhicha street oloc'k,lex- ,posed ;o11t,.of.doors, is subjected. These clocks are also're'latively inexpensive .as all .the-drix'zing mechanism including the power I and the regulating device, with. the exception of .the hour and minute hand .gear wheels, .is'conta-ined ina small cheap clock ,movement, mounted in a frame and casing of its own andadapteditobe easily connected to and removed from the casing of the llang'e clock.

[lo more clearly 1 understand the construct on and operation ofithis invention,atten tlon 1s directedatodheifollowing detailed description and claims,.and,to theaccompany- 'ingidrawing, in which- .Figure 1 is.a frontelevatien ofla street clock constructed :according to the present invention, a parthfthe casing'heinghroken .awaytov show itsxinterior construction. F

2 isawertical central sectional View on'the timemovementto the'hands,v showing .a separable couplingon one end and a flexible ]O'1nt 1n lts'length. vF g. !i is a detailed, sectional view of ananti-Ifriction hearing for suitable .manner, saidlribs being set a? short Y distance within the endsof the [casing .as

shown in 131,9 2. These ribsare connected and stayed by a number of strips orlbarslQ .extendingfromto-ne rib to the o-therzaround.

the casing as: shownv Secured by screws .er otherwise .removably attached to the cuter ,side of each rib I1 is aLheedlS formed ofa circular plate of sheet .metal, to each of which heads .is "fastened by [two opposite sides a frame 14 in which is' journaled the "shafts for the .hourand minute .hands.

.Ag'ainstthe outer face o'fqeachlhead 13 .is .Eastened a dial .15 alsdmade of. authin circularplate fitting closely-within the-end of the casing. The twodials face-in O posite directions, each dial being covered by :a glass can I6-co1nprising a band or ring '17 Tfitting closely over the end of the casing and hevingen inwardly projecting flange 18 on its outer end against which flange a glass plate 19 bears and is held tightly in position by a ring 20 in contact with the inner face of the glass plate and the inner side of the band 17.

"Projecting through an opening in the bottom of the casing 10, and extending both within and without said casing is a cylindrical box-like receptacle 21, its open outer end being provided with a cover or closure 22 adapted to slide into the outer portion of said receptacle and to be' locked thereto by a bayonet joint connection 23. VVit-hin the receptacle 21 is placed a clock movement 24,

one shaft 25 of which projects upwardly duces the friction of rotation of the shaft and at the same time supports its entire weight thus relieving the clock movement from any downward pressure from said shaft. Secured on the shaft is a beveled gear wheel 33 meshing with two similar gear wheels 34 and 35 afiixed on the inner ends of the respective minute hand shafts 36 and 37, surrounding which shafts in the usual manner are the tubular hour hand shafts 38 and 39, between which shafts are the usual gear wheel connections 40 and 41. The hour and minute hand shafts project through the heads 13 and dials l5 and have attached thereto the hands 42 and 4:3.

The clock movement 24 being easily removable from the clock case 10, it is not always possible when replacing the movement to be assured that its shaft 25 is in exact alinement with the shaft 30 to which it is coupled and which if the latter shaft were rigid, even a slight lack of alinement between the two shafts would interfere with and interrupt the movement of the clock. To overcome this difficulty, a universal joint 44 is inserted at any. suitable point in the length of the shaft 30, and by its use, the shafts 25 and 30 although they should be placed at a considerable angle to each other,-

would transmit the motion of the clock mechanism to the hands without strain or v inconvenience.

Large street and sign clocks can be erected on this principle at comparative slight cost,

with small, simple and wholly self con tained mechanism which may be quickly and easily removed as a unit when anyattention is required and returned to place without suspended or supported part, any shaking by the wind or otherwise to which the clock is likely to be subjected will have no effect on its time keeping properties.

What I claim is,

l. A clock of the kind described comprising a casing, and a. plurality of dials, a set of hand rotating gears back of each dial mounted on a frame fixed to the casing, and a single vertical shaft operatively connected to said set of gears for rotating the same,

said shaft being suspended from said frame by one end, the other end hanging free, a receptacle in the bottom of said casing opening out through the wall thereof, a clock movement adapted to be inserted into and removed from said receptacle and to move or vibrate with the casing, the minute hand shaft of said motor clock extending beyond theframe of the same and adapted to proj ect through a hole in the receptacle into the casing, and a slip joint between the suspended vertical shaft and the minute hand shaft of the motor clock.

2. A clock of the kind described comprising a casing and a plurality of dials, a set of hand rotating gears back of each dial, and a single vertical shaft operatively connected with said sets of gears for rotating the same, said gearing and vertical shaft being wholly supported in the casing of the clock, a receptacle in the bottom of said casing opening outwardly through the wall thereof, a clock movement adapted to be easily inserted'int-o and removed from said receptacle and to move with the easing, the minute hand shaft of said motor clock extending beyond the frame of the same and adapted to project through a hole in the receptacle into the casing,and

a universally jointed connection suspended from the vertical hands operating shaft and provided at its lower end with a slip connec tion to engage the minute hand shaft of the motor clock.

3. A clock of the kind described comprising a casing, and a plurality of dials, a set of hand rotating gears back of each dial, and a single vertical shaft operatively connected with said sets of gears for rotating the same, said gearing and vertical shaft being wholly supported in the casing of the clock, a receptacle in the bottom of said casing opening outwardly through the wall thereof, a miniature clock movement adapted to be easily inserted into and removed from said receptacle and to move with the casing, a closure for the open end of said casing adapted to hold the motor clock in place, the minute hand shaft of which clock projects through a hole'in the top wall of the receptacle into the casing, a universally jointed connection suspended from and wholly sustained by the vertical hands operating shaft, and a slip joint'between said my hand in presence of subscribing witshaft and the minute hand shaft of the monesses.

for block, said joint adapted to rotate the GEORGE 0. DE CLARK.

vertical shaft and readily separate there- Witnesses: I 5 from when the motor clock is removed from HENRY Mt'ILLER,

the receptacle. FRIEDRICH GANZ,

In testimony whereof I have hereunto set WILLIAM FR. RAUSCH. 

